Automatic film rewinder



D. L. MATHESON AUTOMATIC FILM REWINDER In vento?" l. alla/waff fto rn @I Filed Feb.19. 192'? Patented Dec. 27, 1927.

UNITED STATE.

DUAYNE L. "mami-Insomma PATIENT OFFICE.

,was mi;

AUTOMATIC FILM REWINDER.

Application led February The resent invention relates to an automatic film 11e-Winder and aims to provide a structure useful particularly in the displaying of motion picture films. It is the common practice to re-wind the film from the take-off roller, this necessitating an additional operation. The present inventiontion, inexpensive to manufacture, thoroughly.

1o reliable and. efficient in operation, easy to manipulate, and otherwise well adapted to the purpose for which it is designed.

With the above and numerous other objects in view as will appear as vthe descripat tion proceeds, the invention resides in the novel features of construction, and in the combination and arrangement of arts as will be hereinafter more fully descrlbed and claimed. i

In the drawings:

Figure 1 is a sectional plan view of the device embodying the features of my invention,

lFig. 2 is an end elevation thereof.

be seen that 5 denotes a stationary shaft, 6

a rotatable shaft having a socket' for rotatable mounting on one end of the stationary shaft, said socket being square on theexte- 3o rior for receiving a drum 8 the rim of which is provided with a transverse slot 9 having a iilm fastening element 10 immedlately adjacent thereto. A stop collar 11 is xed on the shaft 5 remote from thedrum 8. `A colae lar 12 is slidable on the shaft 5,'a third collar 14 is slidable ou the shaft 5, the collar 14 being disposed at one side of thestop collar 11 and the collar 12 being disposed to the other side thereof. A spring 15 is disposed et between the collars 11 and 12 impinging thereagainst and preferably being of the coiled type disposed about the shaftp. A plurality of arms 16 are pivotally7 engaged on the collar 12 and have rollers 1 mounted 5e at their outer ends within the. drum .8. These rollers being' mounted on shafts 18 are held in parallel relationship with the drum 8 by springs 19. Arms 20 are pivotally engaged with the arms 16 as at 21 and with the collars 14 as at 22. rl `he spring 15, therefore, maintains the brackets with their free Referring to the drawing in detail it will 19,1927. serial no. 169,502.

ends ynormally spread apart. A frame 23 is l pivotally mounted on one of the arms 16 as at 24 and has journaledtherein a roller 25. The film is trained over the roller 25 and then about the roller 17 and then passes `through the slot 9 and engages the fastening element 10. The drum is then placed in rotation a-nd the lilm is wound up Ainside the drum, the rollers 17 through'the assistance of the spring 19 and the arms 16 actuated by the ysring 15 through the arms 20 maintaining t e. film pack thus being formed. in a tight condition. y

t is'thought that the construction utility, and advantages of this invention will now be apparent to those skilled in this art without a more detailed description thereof. The

present embodiment of the invention has been disclosed in detail merely by way of eX-` ample since in actual practice it attains the features of advantages enumerated as desirable in the statement of the invention and the above description. Obviously, numerous l changes in details of construction and in the combination and arrangement of parts may be resorted to without departing from the spirit or scope of the invention as hereinafter claimed or sacrificing any of its advantages. v

Having thus described my invention, what I claim as new is:

1. A film winding device of the class described including, in combination, a station'- ary shaft, a rotatable shaft in alinement therewith, a drum on the rotatable shaft having a rim, said drum being provided with a slot in the rim, means on the drum adjacent the slot for anchoring the end -of a film which passes through the slot, a collar slid; ably mounted on the s tationary4 shaft, arms extending from the collar and pivoted thereto, rollers pivoted on the ends of the arms within the rim of the drum to hold layers of the film in tight engagement with each other, spring means urging said arms outwardly so that the rollers will tighten the film coil pack formed within the drum, guide means on one of the arms for the film adapted to guide saidilm during the'rotation of the drum whereby succeeding layers are placed within precedin layers of said film.

2. A film winding device of the class described including, in combination, a stationary shaft, a rotatablel shaft in alinement therewith', a drum on the rotatable shaft having a rim, said drum being provided with nol n 1,653,9641 wwwrun a` slot in the rim, means on the drum coil pack formed Within the drum, guide cent the slot for anchoring the endo/f' a m means on one of the arms for the lm adaptwhich passes through the slot, a eollar slded to guide said film during the' rotation ofably`mountedmon xhefetatoaryhshaarms the drrimwherebfmceeelng liyers are m extending from the collar and pvoted thereplaced within preceding layers of Said lm, to, rollers pvoted on the ends of the arms spring means between the rollers and the Within the rim of the drum bo hold layers arms urging said rollers in'parallelism with of the film in tight engagement with each the drum. other, spring means urging said arm out- In testimony whereof I ax my signature. l. wardly so that the rollers will tighten the DUAYNE L. MATHESON. 

